Accent differences

Hello everyone :)

I speak with a russian accent which often causes a misunderstanding and a need for repetition when I speak to a native american speaker. I have been unsuccessfully trying to research websites that could help me figure out phonetic differences between russian and american. I would be grateful if you could help me find a useful website on the topic or if you could describe the main phonetic differences.
By the way, I'm 18 - is it possible for me to neutralize my accent?

Thank you for all your input :)

Ann Cook is your friend.

I don't think Russian accents are that hard to understand. Your L's and R's are a little different, but still obviously L's and R's. I think your short U's tend to turn into broad A's to our ears. You will probably always have a hint of an accent, but you can certainly improve it with some practice.